I would recommend an Ipad to anyone who is starting to do multi IFR charter... It is great for weather, documents and charts and booking last minute accommodation without making the cockpit look like a scene out of the movie "the hangover" I fly with one and a set of paper jepps neatly tucked away just in case. 1 inch folder with the charts in it. From someone that used to have terrible cockpit organisation I now run a ship like it was an operating theatre. I don't even take a laptop on some trips now.
Following aviation apps installed
-Jeppesen TC
-Naips
-Oz runways
-Dialawiz
-Pilot E6B
-CoPilot (not really used much except looking at sector lengths ect on the run)
-BOM radar
-Pilot Time
I Have found the GPS pretty good but the issue will be the amount of data required to be installed on the machine as you wont be able to download them on the run well at least not everywhere